How to hang up the phone on the iphone lock screen

In the unlocked screen state, the iphone phone calls can be clicked by clicking on the red button to hang up the phone, but the lock screen state to hang up the phone how to do? This problem actually baffled a lot of Apple users, in fact, the method is very simple, small series to teach you.

As shown above in the IPhone5S and previous versions of the power supply above, as long as two consecutive press can refuse to answer the phone, but in iphone6 and plus in the left, but also by two times hung up the phone, click is mute.